Good morning everyone!
I work with Spotless Water. Our ultra pure water is the purest on the market with aquarium hobbyists being one of our biggest markets.
The ultra pure water is a 0TDS reading, but we measure by ppb (parts per billion) rather than the standard test of ppm (parts per million). With this, our stations have the highest technology and filtration system that our engineers are constantly monitoring to make sure that our water stays ultra pure. If there is an issue, then an engineer is instantly deployed.
I understand that there may be some concerns, but we simply encourage testing just in case there is any contamination from a container or from if the pure water is being stored for long periods of time. Your fish are important to you, so that means they're important to us too, and we would not want to risk them.
In regards to price
@DogTailRed2, we're cheaper than aquarium shops and our prices are not increasing unlike the price of fuel or other services. Our team are working hard on expanding as much as we can around the UK in the hope that a station is local to you. A lot of our customers value our service for the convenience and time, as well as the reassurance that using us is a promise for ultra pure water.
If there are any other questions, then please do let me know.